The service car shuttles through the streets of the city and provides all kinds of convenience for people's lives. Compared to those fixed service vehicles, mobile service vehicles have brought convenience to our lives. They can cope with more unexpected situations and can provide us with timely assistance. What characteristics should mobile service vehicles have?
First, the equipment is good and its functions are complete. The main function of the service car is to provide convenience for people, so the equipment on the vehicle should be complete, such as fire extinguishing equipment, rescue equipment, etc. The function should also be diverse, so as to ensure the effective provision of rescue services. The core of the mobile service car is to find a dangerous and timely rescue and provide all kinds of convenience for everyone. Although the types of service vehicles are different, no matter what services are provided, the functions of the vehicles themselves should be complete, and they should be able to respond to general service needs. Professional service vehicles have standard equipment, such as medical service vehicles equipped with basic common drugs, blood pressure monitoring equipment, and oxygen equipment.
Second, the vehicle is highly stable and able to handle a variety of situations. Mobile service vehicles should often travel within the city and find assistance in finding a dangerous situation. Since the loss of the vehicle is large, it should have good stability for the mobile service vehicle , otherwise the vehicle is prone to failure, and thus it cannot continue to provide services. With the continuous improvement of service vehicles, there are now pure electric service vehicles, which have a small investment, are easy to drive, and are fully functional to meet basic service requirements. The service vehicle does not replace the rescue vehicle. It can only provide basic services. The rescue mission still needs rescue vehicles to complete.
Third, the vehicle is equipped with a uniform logo and has a high degree of recognition. A mobile service vehicle in a city should have a uniform logo so that everyone can effectively recognize it when it is in danger or difficult, and reduce the damage caused by the danger. In general, the body of a vehicle should have a distinctive color, and it must have a clear service identity and be differentiated according to different functions so as to better serve the service.
High Precision Machining is defined as a process of changing the dimensions or the performance of workpiece with machining facilities.
According to the temperature of the workpiece while in machining, high precision machining can be divided into cold working and hot working. Usually, machining under indoor temperature, and won't change cause chemical change or phisical phase change is named cold working. On the other hand, if under temperature, higher or lower than room temperature, which will lead to chemical changes or phase changes, it will be called as hot working.
For high precision machining, the machining tolerance can be up to 0.0001-0.001mm, the surface finish Ra can be 0.02-0.1um.
Machining precision is to describe the actual geometrical parameter of the part after machining, such as the size, the form, the position, comparing with the theoretical geometry parameter. The difference from these two parameters is the machining tolerance. The number of the difference show the machining accuracy, the bigger, the lower of the machining precision, the smaller, the higher machining precision.
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